Electric-motor drive for a bowden-cable window lifter

Winding – tensioning – or guiding – Coil holder or support – Spool or core

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Details

49349, 49352, B65H 7538, E05F 1516, E05F 1148

Patent

active

052073939

ABSTRACT:
The invention concerns an electric-motor drive system for a bowden-cable window lifter. The system includes a braking spring in the form of a helical spring in the manner known from manual bowden cable window lifters. This is made possible by the inclusion on the worm wheel of an arcuate slot crossed by a tab affixed to the cable reel and extending to the other side of the worm wheel into the clearance of a ring affixed to the worm wheel. The ring and the tab are enclosed by the helical spring of which the bent-off ends each enter the gap between the tab and ring. These components (ring, tab, and spring) are combined to one side of the worm wheel, and achieve the locking of the cable mechanism--by expanding the spring against a surrounding braking surface--when the mechanism is actuated in reverse by movement of the window pane. Owing to this braking mechanism it becomes possible to select the pitch of the worm and worm-wheel at the most advantageous angle irrespective of the otherwise required self-locking between the worm and worm wheel ordinarily used to stop undesired pane movement.

REFERENCES:
patent: 3203690 (1965-08-01), Werner
patent: 3876184 (1975-04-01), Eudy
patent: 4821589 (1989-04-01), Fukumoto et al.

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